Change iTunes movie and TV show settings on Apple TV
Adjust settings for iTunes movies and TV shows
Open Settings on Apple TV.
Go to Apps > iTunes Movies and TV Shows and do any of the following:
Change the video resolution for purchases and rentals: By default, you rent, purchase, and play back iTunes videos in the highest resolution possible, which requires a fast internet connection. If you have a slower connection, select Video Resolution and choose Good.
Turn Quick Start on or off: Select Quick Start to begin playing videos instantly in the best resolution available. You can turn this off if your internet connection is slower.
Note: If Quick Start is turned off, 4K streaming and Dolby Atmos are disabled.
Watch iTunes Movies and TV Shows in standard definition: Select Limit Purchases and Rentals to SD. If you have a slow internet connection, or want to use less data, turn this setting on.
Set wish list sorting order: Select Sort Movies in Wish List, then select either By Date or Alphabetically.
Set favorites sorting order: Select Sort TV Shows in Favorites, then select either By Date or Alphabetically.